Fig. 2.
An energy diagram illustrating three best known nonlinear optical (NLO) processes used in biomedical imaging: two-photon excited fluorescence (TPEF), second-harmonic generation (SHG) and coherent anti-Stokes Raman scattering (CARS)
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.